Section R. 325.11509 - Retention of records; groundwater supply rulesRule 1509.
In addition to the requirements of R 325.11506, a groundwater supply subject to R 325.10612 shall maintain all of the following information in its records:
(a) Documentation of corrective actions shall be kept for a period of not less than 10 years.(b) Documentation of notice to the public as required under R 325.10408c shall be kept for a period of not less than 3 years.(c) Records of decisions under R 325.10739(1)(e)(ii) and records of invalidation of fecal indicator-positive groundwater source samples under R 325.10739(3) shall be kept for a period of not less than 5 years.(d) For consecutive supplies, documentation of notification to the wholesale supply or supplies of total-coliform positive samples that are not invalidated under R 325.10707a, until March 31, 2016, or under R 325.10704c beginning April 1, 2016 shall be kept for a period of not less than 5 years.(e) For groundwater supplies, including wholesale supplies, that are required to perform compliance monitoring under R 325.10739a all of the following shall be kept: (i) Records of the department-specified minimum disinfectant residual shall be kept for a period of not less than 10 years.(ii) Records of the lowest daily residual disinfectant concentration and records of the date and duration of any failure to maintain the department-prescribed minimum residual disinfectant concentration for a period of more than 4 hours shall be kept for a period of not less than 5 years.(iii) Records of department-specified compliance requirements for membrane filtration and of parameters specified by the department for department-approved alternative treatment and records of the date and duration of any failure to meet the membrane operating, membrane integrity, or alternative treatment operating requirements for more than 4 hours shall be kept for a period of not less than 5 years.Mich. Admin. Code R. 325.11509
2009 AACS; 2015 MR 20, Eff. 10/16/2015